The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · amended

ST02281LA

Installation of internal tank, associated systems and support structure for the aerial dispensing of liquids. Held by Neptune Aviation Services. Last revised September 12, 2022. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
BAE Systems (Operations) Limited
Models
BAe 146-200A
Type certificate
A49EU
On this site
British Aerospace BAE 146 15 registered
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 21, 2026.